Jeti Telemetry Sensor MVario2 EX Variometer/F5J-ALES Limiter & Expander

.MVario2 is a system that measures atmospheric pressure and using the obtained data it calculates the altitude above sea level, airspeed, and the rate of climb as well as the rate of descent. Changes in climb and descent rates are signaled as well. The sensor also alerts you if any alarm setting is exceeded. 

The sensor enables an acoustic signal for the climb rate/descent rate or for exceeding of a pre-adjusted limit value. The acoustic signal consists of 4 different kinds (steps) for climbing and the same amount of steps for descending. The step width can be adjusted by the user. The climb signal consists of short interrupted tones, the descent signal consists of long permanent tones. 

The Duplex system takes advantage of the 2.4GHz band for communication. This system not only transmits control data to the model but also sends data from the model back to the transmitter. The telemetry data collected during operation is shown as actual, measured values in real time on either LCD screen of a connected JetiBox Profi or on the DC/DS line of Jeti transmitters. 

For competition flights in FAI F5J category there exists a separate firmware that is freely available to be downloaded on www.jetimodel.com and is always marked with its version MVARIO2 V. FX.XX. This firmware has been made as simple as possible, the telemetry functions are blocked and is possible to be used only as an altitude limiter. 

More information (links):
* Instruction Manual (pdf.)

Dimensions: 35mm x 16mm x 7mm
Weight: 5g (with wires)
Accuracy for absolute/relative altitude : +/-9m, +/-3m
Measurement Range: 100-1100 mBarr
Operation Temp: -10C to +85C
Supply Voltage: 3.5V to 8.4V
Current Draw: 15mA

Expander Setting
Due to its flexibility, the MVario2 EX allows connection of up to two additional sensors. MVario2 then acts as an Expander and sends its own telemetry to the receiver together with the telemetry of connected sensors. You can connect for example speedometer MSPEED EX for the speed compensation (TEK) or any other sensor to any port (Ext1 or Ext2). 

For the MSPEED EX sensor, a firmware update in the Files for download section is available, which improves the properties usable by the MVario2 total energy compensation of the model (the update offers increased refresh rate of indicated airspeed). 

 


F5J/ALES Altitude & Time Limiter, Motor Cut-Off Switch
If you participate in competitions in categories such as F5J or ALES (Altitude Limited Electric Soaring), set the appropriate device mode (F5J/ALES) in the MVario2 menu. Next, connect the receiver and the speed controller (ESC) as shown. The standard firmware allows you to set the cut-off height and the maximum time of motor operation. 

As an alternative to the standard firmware, there is a special version certified for official competitions of FAI F5J category, which can be found in the Files for download section. During the competition you must have installed exactly this version. 

 


Logical Sensor 
MVario2 EX can be configured as a sensor of logic levels (log. 0 or log. 1). If you want to be informed whether the landing gear is properly secured, the logic inputs function is very convenient. Simply connect the limit switch as shown - between the signal wire and the ground (minus) - this way you will know immediately whether the switch is on or off.